105111212 has 12 divisors (see below), whose sum is σ = 184630320. Its totient is φ = 52359696.

The previous prime is 105111199. The next prime is 105111217. The reversal of 105111212 is 212111501.

It is a super-4 number, since 4×105111212⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (105111217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47768 + ... + 49919.

It is an arithmetic number, because the mean of its divisors is an integer number (15385860).

Almost surely, 2^105111212 is an apocalyptic number.

It is an amenable number.

105111212 is a deficient number, since it is larger than the sum of its proper divisors (79519108).

105111212 is a wasteful number, since it uses less digits than its factorization.

105111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97960 (or 97958 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 105111212 is about 10252.3759197564. The cubic root of 105111212 is about 471.9358993196.

Adding to 105111212 its reverse (212111501), we get a palindrome (317222713).

The spelling of 105111212 in words is "one hundred five million, one hundred eleven thousand, two hundred twelve".